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 ###Instrução: Qual é o prêmio médio do primeiro lugar do torneio com uma pontuação de 279 (-9)?
 ###Tabelas: CREATE TABLE list_of_sponsored_cosponsored_legislation (list_of_sponsored_cosponsored_legislation_id AUTO_INCREMENT PRIMARY KEY, Years covered VARCHAR, All bills sponsored INT, All amendments sponsored INT, All bills cosponsored INT, All amendments cosponsored INT, Original bills cosponsored INT, Original amendments cosponsored INT, Bill support withdrawn INT, Amendment support withdrawn INT) CREATE TABLE tournament_results (tournament_results_id AUTO_INCREMENT PRIMARY KEY, Date VARCHAR, Tournament VARCHAR, Location VARCHAR, Winner VARCHAR, Score VARCHAR, 1st prize ( $ ) INT) CREATE TABLE season_9:_2007 (season_9:_2007_id AUTO_INCREMENT PRIMARY KEY, Series Ep. VARCHAR, Episode INT, Netflix VARCHAR, Segment A VARCHAR, Segment B VARCHAR, Segment C VARCHAR, Segment D VARCHAR) CREATE TABLE iodine-123 (iodine-123_id AUTO_INCREMENT PRIMARY KEY, Name VARCHAR, Investigation VARCHAR, Route of administration VARCHAR, In-vitro / in-vivo VARCHAR, Imaging / non-imaging VARCHAR) CREATE TABLE former_clubs (former_clubs_id AUTO_INCREMENT PRIMARY KEY, Club VARCHAR, Nickname VARCHAR, Years competed VARCHAR, Home Ground VARCHAR, Premierships VARCHAR)  
SELECT AVG 1st prize ( $ ) FROM tournament_results WHERE Score = 279 (–9)